Bump snowflake-connector-python from 4.6.0 to 4.7.2 in /Controller

[dependabot]

Bumps snowflake-connector-python from 4.6.0 to 4.7.2.

Release notes

Sourced from snowflake-connector-python's releases.

4.7.2

• v4.7.2(Aug 6,2026)
  • Fixed a thread leak in the file transfer agent by properly shutting down ThreadPoolExecutors after PUT/GET transfers (SNOW-3556240, #2878).
  • Fixed split_statements treating // as SQL instead of a line comment, which could merge multiple statements when a // comment contained an apostrophe (SNOW-3772985).
  • Fixed large-file PUT uploads to internal Azure stages failing against the Azure 50,000-block-per-blob limit. The Azure multipart chunk size is now scaled up dynamically for very large files (mirroring the existing S3 behavior), and the default Azure chunk size was raised from 4 MB to 8 MB (consistent with S3) for better throughput (SNOW-3839943).
  • Fixed OAuth cached-credential connections failing with 250001 Invalid OAuth access token when the cached token was invalid (GS code 390303); the connector now reauthenticates silently (via refresh token if available, otherwise browser) instead of hard-failing. Also fixed fresh processes holding only a cached refresh token going straight to an interactive browser prompt instead of attempting a silent refresh first.
  • Fixed Okta/SAML authentication reporting an exhausted login_timeout as 250003: Failed to execute request: Attempted to set connect timeout to <negative value>. Obtaining the one-time token in step 4 can overshoot the login deadline, which made the remaining budget negative; it was then passed to the HTTP layer, which rejected it with an opaque ValueError. A timed-out SAML login now raises 250006 with a message naming login_timeout. Running out of budget while retrying on RefreshTokenError reports the same error instead of failing later with an AttributeError on an empty response (SNOW-3891419).
  • Fixed OAuth authorization code flow failing for accounts with uppercase letters in the account name. urlparse().hostname always returns lowercase, but the host was compared case-sensitively in _is_snowflake_as_idp, causing Snowflake-as-IdP detection to return False and raising error 251013 (client_id is empty) even for connections that don't require a client ID.

4.7.1

• v4.7.1(Jul 15,2026)
  • Added support for Python 3.14t (free-threaded).
    • Note: Python 3.14t CI testing excludes win_arm64 (no cryptography wheels available) and mitmproxy proxy tests on all platforms (transitive dependencies aioquic/pylsqpack lack free-threaded-compatible wheels).
  • Improved verification of TLS connections (SNOW-3675579).
  • Fixed python-connector.log not rotating on Windows, and every record being logged twice, when easy logging is enabled via config.toml (SNOW-3680325).
    • Note: As part of this fix, easy logging no longer calls logging.basicConfig() and therefore no longer configures the root logger. python-connector.log now captures only the snowflake.connector, botocore, and boto3.
  • Improved URL validation reliability by replacing the hand-rolled regex in is_valid_url() with urllib.parse.urlparse (SNOW-3392651).
  • Fixed OAuth infinite loop when tokens expire by ensuring reauthenticate() calls _request_tokens() directly instead of looping through prepare(). Token cache is now read exactly once per connection, and _store_tokens() preserves macOS Keychain ACL by never calling remove(). The async OAuth reauthenticate() now runs the synchronous OAuth flow on a worker thread instead of blocking the event loop.
  • Fixed OAuth scope handling for Snowflake custom OAuth: when refresh tokens are enabled, the connector no longer appends the OIDC offline_access scope for token endpoints on *.snowflakecomputing.com or *.snowflakecomputing.cn, which caused invalid_scope errors. Snowflake custom OAuth expects refresh_token in scope instead. External IdP behavior is unchanged.
  • Fixed input validation for scale metadata in Arrow result set processing for TIME, TIMESTAMP_NTZ, TIMESTAMP_LTZ, and TIMESTAMP_TZ columns (SNOW-3388299).
  • Fixed S3 storage client to correctly handle 307/308 (method-preserving) and 301/302 (GET/HEAD only) redirects by disabling automatic redirect following and re-signing each request with AWS SigV4 credentials for the redirect target. The region is updated from the x-amz-bucket-region response header on each redirect. Redirects are capped at 5 hops.
  • Added native AKS (Azure Kubernetes Service) workload identity support. When running on AKS with workload identity configured, the connector automatically uses WorkloadIdentityCredential to authenticate via the injected service account credentials. OIDC backward compatibility is also supported.
  • Added the workload_identity_aws_use_outbound_token connection option (default false) to opt into AWS WIF JWT attestation via STS GetWebIdentityToken instead of the default SigV4 GetCallerIdentity method.
  • Fixed a bug where a fully-qualified DDL statement (e.g. CREATE VIEW db.schema.obj) on a session with no current schema would populate the connector's cached _schema/_database from the referenced object's namespace. This made get_current_schema() diverge from the server's CURRENT_SCHEMA() and mis-qualified Snowpark temp objects (SNOW-3665226).

4.7.0

• v4.7.0(Jul 2,2026)
  • Fixed python-connector.log not rotating on Windows, and every record being logged twice, when easy logging is enabled via config.toml (SNOW-3680325).
    • Note: As part of this fix, easy logging no longer calls logging.basicConfig() and therefore no longer configures the root logger. python-connector.log now captures only the snowflake.connector, botocore, and boto3.
  • Improved URL validation reliability by replacing the hand-rolled regex in is_valid_url() with urllib.parse.urlparse (SNOW-3392651).
  • Fixed OAuth infinite loop when tokens expire by ensuring reauthenticate() calls _request_tokens() directly instead of looping through prepare(). Token cache is now read exactly once per connection, and _store_tokens() preserves macOS Keychain ACL by never calling remove(). The async OAuth reauthenticate() now runs the synchronous OAuth flow on a worker thread instead of blocking the event loop.
  • Fixed OAuth scope handling for Snowflake custom OAuth: when refresh tokens are enabled, the connector no longer appends the OIDC offline_access scope for token endpoints on *.snowflakecomputing.com or *.snowflakecomputing.cn, which caused invalid_scope errors. Snowflake custom OAuth expects refresh_token in scope instead. External IdP behavior is unchanged.
  • Fixed input validation for scale metadata in Arrow result set processing for TIME, TIMESTAMP_NTZ, TIMESTAMP_LTZ, and TIMESTAMP_TZ columns (SNOW-3388299).
  • Removed pandas upper bound dependency constraint on the [pandas] extra to allow installation of pandas 3.0.0 and later.
  • Fixed S3 storage client to correctly handle 307/308 (method-preserving) and 301/302 (GET/HEAD only) redirects by disabling automatic redirect following and re-signing each request with AWS SigV4 credentials for the redirect target. The region is updated from the x-amz-bucket-region response header on each redirect. Redirects are capped at 5 hops.
  • Added native AKS (Azure Kubernetes Service) workload identity support. When running on AKS with workload identity configured, the connector automatically uses WorkloadIdentityCredential to authenticate via the injected service account credentials. OIDC backward compatibility is also supported.
  • Added the workload_identity_aws_use_outbound_token connection option (default false) to opt into AWS WIF JWT attestation via STS GetWebIdentityToken instead of the default SigV4 GetCallerIdentity method.
  • Fixed a bug where a fully-qualified DDL statement (e.g. CREATE VIEW db.schema.obj) on a session with no current schema would populate the connector's cached _schema/_database from the referenced object's namespace. This made get_current_schema() diverge from the server's CURRENT_SCHEMA() and mis-qualified Snowpark temp objects (SNOW-3665226).

Commits

• 57c450e Merge branch 'main' into bump-version-4.7.2
• 0e56c78 Fix OAuth IdP detection breaking for uppercase account names (#2991)
• fc13d30 Merge branch 'main' into bump-version-4.7.2
• 48d9279 SNOW-3556240: Properly finalize ThreadPoolExecutors in file transfer agent (#...
• c8649ba SNOW-3891419: Report Okta login timeout instead of passing a negative timeout...
• 0e09ecd Update requirements files
• 669f72d Bump up version to 4.7.2
• 18a22b2 Recover from stale cached OAuth access tokens without a browser (#2979)
• ba1b98e SNOW-3887909 bump GitHub Actions to Node 24-compatible majors (#2986)
• d2ac459 SNOW-3839943: Scale Azure PUT chunk size to respect the 50,000-block limit (#...
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